HPUX support and avr32 test fixes.

testsuite/libffi.call/ffitest.h

@@ -2,11 +2,17 @@
 #include <stdio.h>
 #include <string.h>
 #include <fcntl.h>
-#include <stdint.h>
-#include <inttypes.h>
 #include <ffi.h>
 #include "fficonfig.h"
 
+#if defined HAVE_STDINT_H
+#include <stdint.h>
+#endif
+
+#if defined HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+
 #define MAX_ARGS 256
 
 #define CHECK(x) !(x) ? abort() : 0